These were on top of a water softener and carbon tank. it fits mostly all universal tanks. Great for any diy project or anything you wish. They will fit the Nelson, Kinetico, culligan tanks, aqua systems and many others. It has in and out threaded ports. Does not come with bypass or connectors. Pictured is what you get. I do have bypass listed in separate listing. Standard 1.5" connection Selling as is all sales are final No returns